I have a bunch of computers that are running technet Win 7 Pro licenses (intended to be evaluation only, but fully functional). These machines need to "go legit" in the near future. Can I use an $89.99 "Anytime Upgrade" key to go legit, upgrading from Win 7 Pro (Technet) to Win 7 Pro (Legit)?
Assuming your technet reseller does not prohibit you from doing so, there is nothing that explicitly prohibits you from upgrading a technet license to a full version.
Though, there is nothing that explicitly states that the anytime license will upgrade the technet version. Your mileage may vary.